Strain induced magnetic domain evolution and spin reorientation transition in epitaxial manganite films

The evolution of magnetic domain structure in epitaxial La0.625Ca0.375MnO3 films on (001) NdGaO3 is monitored as a function of temperature and magnetic field using magnetic force microscopy. We see two distinct regions of magnetic orientational order: one in-plane displaying contrast-less image and...

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Bibliographic Details
Published in:Applied physics letters 2012-07, Vol.101 (2)
Main Authors: Singh, Gyanendra, Rout, P. K., Porwal, Rajni, Budhani, R. C.
Format: Article
Language:English
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Summary:The evolution of magnetic domain structure in epitaxial La0.625Ca0.375MnO3 films on (001) NdGaO3 is monitored as a function of temperature and magnetic field using magnetic force microscopy. We see two distinct regions of magnetic orientational order: one in-plane displaying contrast-less image and the other tilted away from the film plane forming a distinct stripe pattern. A strong domain splitting is observed at the boundary of two regions, which is resilient to reorientation with temperature and magnetic field. We propose a model magnetic free energy functional to explain the mechanism of domain splitting seen in manganite films.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4734732